Water Management General

OpenLearn: Water for Life
Water for Life
OpenLearn: Following the Flow
Following the Flow
OpenLearn: Groundwater
Groundwater
OpenLearn: Water Quality
Water Quality
OpenLearn: Extending Water Resources
Extending Water Resources
OpenLearn: Global Water Resources
Global Water Resources

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• Water Control Structures

• Water control structures are used in North Carolina to manage the dpeth of the ground water in fields in eastern North Carolina. By manipulating the depth of the water table, farmers can promote the denitrification as a means of protecting water quality

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• City water testing laboratory, 1948

• Item 41114, Engineering Department Photographic Negatives (Record Series 2613-07), Seattle Municipal Archives.

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• Sewage treatment plant

• Though most developed countries treat sewage, treatment levels do not generally remove nutrients from the wastewater that is discharged. One exception is the state of Maryland (U.S.) where all major sewage treatment plants are required to upgrade to enhanced nutrient removal technologies that will remove most of the nutrients from the wastewater.

• Photo Credit: Chesapeake Bay Program

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• Trickling Filter Bed

• A trickling filter bed water treatment system. Also known as percolating filters, this simple wastewater treatment system consists of spraying wastewater into a corrugated medium (e.g. stone, gravel) where a layer of microorganisms (biofilm) exists. As the water traverses through the medium, organic particles are attached to the biofilm eliminating organic residues. Small filters such as this one are recommended for use in farms or places lacking municipal sewage treatment systems.

• Photo Credit: Hugh Venables | Geograph.org.uk

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• Water pollution from dairy operation
• Water pollution due to dairy farming in the Wairarapa in New Zealand.
• Photo Credit: Alan Liefting | Wikimedia Commons